Summary
Whole young plants were allowed to fix photosynthetically C14O2 for 12 hours. The absolute amount and the specific activity of trigonelline, caffeine and glucose in developing and adult leaves were subsequently determined during up to five weeks. There is a rapid incorporation of photosynthetically fixed carbon into trigonelline in both developing and adult leaves. The specific activity of caffeine however increases to any extent only in young developing leaves. It can be concluded that both trigonelline and caffeine are synthesized in leaves ofCoffea arabica. Other problems of the metabolism and translocation of the two substances are discussed.
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Wanner, H., Blaim, K. Ein Beitrag zur Biosynthese und Physiologie von Kaffein und Trigonellin beiCoffea arabica . Planta 56, 499–510 (1961). https://doi.org/10.1007/BF01938604
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DOI: https://doi.org/10.1007/BF01938604